Earth Quote by Sunita Williams

With no gravitational force to work against, your body not only doesn't need the same amount of muscle and bone, it starts breaking them…

— Neil deGrasse Tyson

One thing we've learned about space is that the human body starts to fall apart after relatively short exposures to microgravity.

— Homer Hickam

Two hundred miles from the surface of the earth there is no gravity. The laws of motion are suspended. You could turn somersaults slowly…

— Jeanette Winterson

The microgravity or the very, very low amount of gravity that we have up in space forces some changes in different processes. It forces…

— Laurel Clark

“As on Earth, weight-bearing exercise is the best way to hang on to your bone. In zero gravity, of course, you have to create…

— Mary Roach

If you only exercise your soloist muscles, the other muscles quickly atrophy.

— Cate Blanchett

Gravity always sucks. It really, really does. It's a big challenge just re-adapting to feeling heavy again, you know? Even my arm feels heavy.…

— Peggy Whitson

Gravity pulls our bodily fluids down, like water in a glass goes to the bottom part of a glass. In space, the water doesn't…

— Laurel Clark

Other anatomical changes associated with long-duration space flight are definitely negative: the immune system weakens, the heart shrinks because it doesn't have to strain…

— Chris Hadfield

“Sedentarism reduces afferent input – particularly from the sole of the foot – and promotes tension in postural (anti-gravity) muscles while leading to inhibition…

— Leon Chaitow

“In general the fact that gravitational and inertial forces are both proportional to the mass of the body on which they act but depend…

— Steven Weinberg

You have to stay active; it keeps the bones flexible.

— Maye Musk